The DECT-NR+ protocol embraces specific design choices to facilitate co-existence with other DECT technologies:

  1. Nominal Channel Bandwidth: The smallest nominal channel bandwidth aligns with existing DECT systems, measuring 1,728 MHz.
  2. Alignment of Center Frequencies: Operating channel center frequencies align with DECT when using the nominal channel bandwidth of 1,728 MHz. For wider nominal channel bandwidths, alignment ensures that transmissions respect the channel raster, minimizing overlapping.
  3. Frame, Slot, and Subslot Alignment: DECT-2020 NR’s frame, slot, and subslot lengths align with those of DECT, ensuring compatibility and synchronization.
  4. Transmission Lengths: Transmission lengths are structured as multiples of subslot and slot lengths, contributing to organized communication patterns.
  5. Scheduled Resource Allocation: DECT-2020 NR supports the allocation of scheduled resources, promoting efficient spectrum utilization and reducing the likelihood of interference.

Advanced Spectrum Management Functions

DECT-2020 NR introduces advanced spectrum management functions to enhance co-existence in complex wireless environments:

  1. Operating Channel and Subslots Clause: In Frequency-Time (FT) mode, the system identifies available spectrum resources with the lowest interference levels, optimizing the choice of operating channel and subslots.
  2. Optimal RD Association: In Peer-to-Peer Time (PT) mode, the system enables an RD to associate with the most suitable RD in FT mode, minimizing spectrum utilization while maintaining efficient communication.
  3. Transmission Power Control: DECT-2020 NR employs transmission power control to minimize TX power usage and mitigate interference caused to other systems, ensuring smooth co-existence.
  4. Interference Detection and Measurement: The system possesses the capability to detect and measure transmissions from other DECT-2020 NR systems, assisting in identifying potential sources of interference.
  5. System Identification: DECT-2020 NR systems can identify each other, facilitating coordinated communication and reducing unintentional interference.
  6. RSSI Measurements: The technology enables RSSI-1 and RSSI-2 measurements for transmissions occurring within the DECT-2020 NR operating frequency band, aiding in interference monitoring.
  7. Time Synchronization: DECT-2020 NR systems achieve time synchronization over the air, both within the system and between different systems, ensuring precise coordination.
  8. Listen Before Talk (LBT) with Exponential Back-Off: LBT is employed for transmitting random access resources, enhancing the fairness and efficiency of wireless spectrum usage.
  9. Regulation-Based Frequency and Bandwidth Setting: The system can adapt the operating channel center frequency and nominal channel bandwidth according to regulatory requirements, maintaining compliance.

Want more information about 5G? Read more of our articles by visiting our 5G category. DECT-2020 is an open standard managed via ETSI and supported by the DECT Forum

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